transmission slop / clunk
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Joined: Jan 2003
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From: Apple Valley mn
transmission slop / clunk
Manual trans slop / freeplay going in reverse or forward from a dead stop....car in question is a 2004 C5 six speed with 17,000 miles....New owner of this C5..asking if slop in the trans is normal. Indications are with car in gear(not running) and you rock the rear wheel (either side) back and forth, I get this clunking sound which appears to be coming from the transmission. I first noticed this when you back-up the car from a dead stop and it "clunks' before moving. Same happens in first gear from a dead stop. I checked all bolt connections in the undercarrage and all is normal...half shafts are tight and rock together with the wheel with no slop... any comments? Is this just a normal C5 issue..??
Burning Brakes
Joined: Jun 2012
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From: Orange County California
Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
There is a good bit of lost motion in all of the splined joints and between the rear and transmission gears. So,,,,,, yes,,,, there will be some lost motion. Without being there or seeing it, its difficult to determine if it’s more than normal. If there wasn’t any clearance between the sliding parts, they would have significant wear issues when they expanded when HOT.
Here is something that you can do that will give you the creeps.
If you have a MN6/MN12, start the engine. Put the trans in neutral, let out the clutch and turn OFF the ignition. Listen to the drivetrain!!!
Its perfectly normal by the way!!
That’s the lost motion in the clutch, torque tube and tranny making noise as the engine coast down to a stop.
If you press in the clutch, it will not make that noise..
Bill
Here is something that you can do that will give you the creeps.
If you have a MN6/MN12, start the engine. Put the trans in neutral, let out the clutch and turn OFF the ignition. Listen to the drivetrain!!!
Its perfectly normal by the way!!
That’s the lost motion in the clutch, torque tube and tranny making noise as the engine coast down to a stop.
If you press in the clutch, it will not make that noise..Bill
Thread Starter
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Joined: Jan 2003
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From: Apple Valley mn
Thanks Bill...I did that once when I first got the car and it was scary !! Its hard to believe that the GM engineers couldn't work that out of the drivetrain by the 2004 model....all and all, its still a Chevy.
Burning Brakes
Joined: Jul 2004
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From: MA
I had this problem. It is an easy fix. The problem is that there is a spline shaft on each rear output shaft at both rear wheels. If you take off the center cap of your wheels you will see a large nut. That has to be re torqued.
See my post here:
http://forums.corvetteforum.com/c5-t...-for-a-c5.html
See my post here:
http://forums.corvetteforum.com/c5-t...-for-a-c5.html
Thread Starter
Intermediate
Joined: Jan 2003
Posts: 35
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From: Apple Valley mn
torque of rear shaft nut
I had this problem. It is an easy fix. The problem is that there is a spline shaft on each rear output shaft at both rear wheels. If you take off the center cap of your wheels you will see a large nut. That has to be re torqued.
See my post here:
http://forums.corvetteforum.com/c5-t...-for-a-c5.html
See my post here:
http://forums.corvetteforum.com/c5-t...-for-a-c5.html
Thread Starter
Intermediate
Joined: Jan 2003
Posts: 35
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From: Apple Valley mn
touque the nut...cure the problrm
Well Vette1 ..I owe you a beer. I did what you reconmended and it fixed the problem..unbelievable!! My 2004 is like driving a new car. I would advise all C5 owners to re-torque the half shaft nuts>I really made a huge difference
